There is not a single person who did not vote for Romney, that would vote for him. He appeals to no one.
This is unrealistic. Huckabee and Romney appeal to vastly different groups. Huckabee and Romney would attract about as different sets of voters as 2 consecutive Republican nominees could.
There is NO way he wins. The evangelical crowd are influential in the GOP, but they're still a small minority.
This is also unrealistic. Their numbers are eroding but they're still anywhere from a large minority to a majority of GOP primary voters, i.e. enough to nominate one of their own.That's the reality.